Set Screw EMT Connector 1-1/2″, Zinc Plated Steel
https://hotfix.nsiindustries.com/product/set-screw-emt-connector-1-1-2-zinc-plated-steel/
Use Bridgeport set screw EMT connectors to connect electrical metallic tubing to an electrical box or enclosure. Featuring a set-screw design and locknut, these connectors create a concrete-tight seal at the point of connection.